Which of the following is the correct way to declare a Kotlin function with a default parameter value?

easy📝 Syntax Q12 of 15

Kotlin - Functions

Afun add(a: Int, b: Int default 5) { return a + b }

Bfun add(a: Int = 5, b: Int) { return a + b }

Cfun add(a: Int, b: Int) = a + b = 5

Dfun add(a: Int, b: Int = 5) { return a + b }

Step-by-Step Solution

Solution:

Step 1: Check Kotlin syntax for default parameters
In Kotlin, default values are assigned using = after the parameter type, like b: Int = 5.
Step 2: Validate each option
fun add(a: Int, b: Int = 5) { return a + b } correctly uses b: Int = 5. fun add(a: Int = 5, b: Int) { return a + b } places default before non-default parameter, which is allowed but can cause ambiguity if called without named arguments. Options A and C have invalid syntax.
Final Answer:
fun add(a: Int, b: Int = 5) { return a + b } -> Option D
Quick Check:
Default value syntax = parameter: Type = value [OK]

Quick Trick: Use '=' after type to set default value [OK]

Common Mistakes:

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